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u-boot/board/dhelectronics/dh_imx6/dh_imx6_spl.c
Marek Vasut ab2a6e82d4 ARM: imx6: dh-imx6: Enable d-cache early in SPL 
Enable d-cache early in SPL right after DRAM is started up.
This reduces U-Boot proper load time by 650ms when loaded
from SPI NOR.

Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Philip Oberfichtner <pro@denx.de>
2022-09-01 17:18:42 -04:00

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// SPDX-License-Identifier: GPL-2.0+
/*
* DHCOM DH-iMX6 PDK SPL support
*
* Copyright (C) 2017 Marek Vasut <marex@denx.de>
*/
#include <common.h>
#include <cpu_func.h>
#include <init.h>
#include <asm/arch/clock.h>
#include <asm/arch/crm_regs.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/iomux.h>
#include <asm/arch/mx6-ddr.h>
#include <asm/arch/mx6-pins.h>
#include <asm/arch/sys_proto.h>
#include <asm/cache.h>
#include <asm/gpio.h>
#include <asm/mach-imx/boot_mode.h>
#include <asm/mach-imx/iomux-v3.h>
#include <asm/mach-imx/mxc_i2c.h>
#include <asm/io.h>
#include <asm/system.h>
#include <errno.h>
#include <fuse.h>
#include <fsl_esdhc_imx.h>
#include <i2c.h>
#include <mmc.h>
#include <spl.h>
#include <linux/delay.h>
#define ENET_PAD_CTRL \
(PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED | PAD_CTL_DSE_40ohm | \
PAD_CTL_HYS)
#define GPIO_PAD_CTRL \
(PAD_CTL_HYS | PAD_CTL_SPEED_MED | PAD_CTL_DSE_40ohm)
#define SPI_PAD_CTRL \
(PAD_CTL_HYS | PAD_CTL_SPEED_MED | PAD_CTL_DSE_40ohm | \
PAD_CTL_SRE_FAST)
#define UART_PAD_CTRL \
(PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED | PAD_CTL_DSE_40ohm | \
PAD_CTL_SRE_FAST | PAD_CTL_HYS)
#define USDHC_PAD_CTRL \
(PAD_CTL_PUS_47K_UP | PAD_CTL_SPEED_LOW | PAD_CTL_DSE_80ohm | \
PAD_CTL_SRE_FAST | PAD_CTL_HYS)
static const struct mx6dq_iomux_ddr_regs dhcom6dq_ddr_ioregs = {
.dram_sdclk_0 = 0x00020030,
.dram_sdclk_1 = 0x00020030,
.dram_cas = 0x00020030,
.dram_ras = 0x00020030,
.dram_reset = 0x00020030,
.dram_sdcke0 = 0x00003000,
.dram_sdcke1 = 0x00003000,
.dram_sdba2 = 0x00000000,
.dram_sdodt0 = 0x00003030,
.dram_sdodt1 = 0x00003030,
.dram_sdqs0 = 0x00000030,
.dram_sdqs1 = 0x00000030,
.dram_sdqs2 = 0x00000030,
.dram_sdqs3 = 0x00000030,
.dram_sdqs4 = 0x00000030,
.dram_sdqs5 = 0x00000030,
.dram_sdqs6 = 0x00000030,
.dram_sdqs7 = 0x00000030,
.dram_dqm0 = 0x00020030,
.dram_dqm1 = 0x00020030,
.dram_dqm2 = 0x00020030,
.dram_dqm3 = 0x00020030,
.dram_dqm4 = 0x00020030,
.dram_dqm5 = 0x00020030,
.dram_dqm6 = 0x00020030,
.dram_dqm7 = 0x00020030,
};
static const struct mx6dq_iomux_grp_regs dhcom6dq_grp_ioregs = {
.grp_ddr_type = 0x000C0000,
.grp_ddrmode_ctl = 0x00020000,
.grp_ddrpke = 0x00000000,
.grp_addds = 0x00000030,
.grp_ctlds = 0x00000030,
.grp_ddrmode = 0x00020000,
.grp_b0ds = 0x00000030,
.grp_b1ds = 0x00000030,
.grp_b2ds = 0x00000030,
.grp_b3ds = 0x00000030,
.grp_b4ds = 0x00000030,
.grp_b5ds = 0x00000030,
.grp_b6ds = 0x00000030,
.grp_b7ds = 0x00000030,
};
static const struct mx6sdl_iomux_ddr_regs dhcom6sdl_ddr_ioregs = {
.dram_sdclk_0 = 0x00020030,
.dram_sdclk_1 = 0x00020030,
.dram_cas = 0x00020030,
.dram_ras = 0x00020030,
.dram_reset = 0x00020030,
.dram_sdcke0 = 0x00003000,
.dram_sdcke1 = 0x00003000,
.dram_sdba2 = 0x00000000,
.dram_sdodt0 = 0x00003030,
.dram_sdodt1 = 0x00003030,
.dram_sdqs0 = 0x00000030,
.dram_sdqs1 = 0x00000030,
.dram_sdqs2 = 0x00000030,
.dram_sdqs3 = 0x00000030,
.dram_sdqs4 = 0x00000030,
.dram_sdqs5 = 0x00000030,
.dram_sdqs6 = 0x00000030,
.dram_sdqs7 = 0x00000030,
.dram_dqm0 = 0x00020030,
.dram_dqm1 = 0x00020030,
.dram_dqm2 = 0x00020030,
.dram_dqm3 = 0x00020030,
.dram_dqm4 = 0x00020030,
.dram_dqm5 = 0x00020030,
.dram_dqm6 = 0x00020030,
.dram_dqm7 = 0x00020030,
};
static const struct mx6sdl_iomux_grp_regs dhcom6sdl_grp_ioregs = {
.grp_ddr_type = 0x000C0000,
.grp_ddrmode_ctl = 0x00020000,
.grp_ddrpke = 0x00000000,
.grp_addds = 0x00000030,
.grp_ctlds = 0x00000030,
.grp_ddrmode = 0x00020000,
.grp_b0ds = 0x00000030,
.grp_b1ds = 0x00000030,
.grp_b2ds = 0x00000030,
.grp_b3ds = 0x00000030,
.grp_b4ds = 0x00000030,
.grp_b5ds = 0x00000030,
.grp_b6ds = 0x00000030,
.grp_b7ds = 0x00000030,
};
static const struct mx6_mmdc_calibration dhcom_mmdc_calib_4x4g_1066 = {
.p0_mpwldectrl0 = 0x00150019,
.p0_mpwldectrl1 = 0x001C000B,
.p1_mpwldectrl0 = 0x00020018,
.p1_mpwldectrl1 = 0x0002000C,
.p0_mpdgctrl0 = 0x43140320,
.p0_mpdgctrl1 = 0x03080304,
.p1_mpdgctrl0 = 0x43180320,
.p1_mpdgctrl1 = 0x03100254,
.p0_mprddlctl = 0x4830383C,
.p1_mprddlctl = 0x3836323E,
.p0_mpwrdlctl = 0x3E444642,
.p1_mpwrdlctl = 0x42344442,
};
static const struct mx6_mmdc_calibration dhcom_mmdc_calib_2x4g_800 = {
.p0_mpwldectrl0 = 0x0040003C,
.p0_mpwldectrl1 = 0x0032003E,
.p0_mpdgctrl0 = 0x42350231,
.p0_mpdgctrl1 = 0x021A0218,
.p0_mprddlctl = 0x4B4B4E49,
.p0_mpwrdlctl = 0x3F3F3035,
};
static const struct mx6_mmdc_calibration dhcom_mmdc_calib_4x2g_1066 = {
.p0_mpwldectrl0 = 0x001a001a,
.p0_mpwldectrl1 = 0x00260015,
.p0_mpdgctrl0 = 0x030c0320,
.p0_mpdgctrl1 = 0x03100304,
.p0_mprddlctl = 0x432e3538,
.p0_mpwrdlctl = 0x363f423d,
.p1_mpwldectrl0 = 0x0006001e,
.p1_mpwldectrl1 = 0x00050015,
.p1_mpdgctrl0 = 0x031c0324,
.p1_mpdgctrl1 = 0x030c0258,
.p1_mprddlctl = 0x3834313f,
.p1_mpwrdlctl = 0x47374a42,
};
static const struct mx6_mmdc_calibration dhcom_mmdc_calib_4x2g_800 = {
.p0_mpwldectrl0 = 0x003A003A,
.p0_mpwldectrl1 = 0x0030002F,
.p1_mpwldectrl0 = 0x002F0038,
.p1_mpwldectrl1 = 0x00270039,
.p0_mpdgctrl0 = 0x420F020F,
.p0_mpdgctrl1 = 0x01760175,
.p1_mpdgctrl0 = 0x41640171,
.p1_mpdgctrl1 = 0x015E0160,
.p0_mprddlctl = 0x45464B4A,
.p1_mprddlctl = 0x49484A46,
.p0_mpwrdlctl = 0x40402E32,
.p1_mpwrdlctl = 0x3A3A3231,
};
static const struct mx6_mmdc_calibration dhcom_mmdc_calib_2x2g_800 = {
.p0_mpwldectrl0 = 0x0040003C,
.p0_mpwldectrl1 = 0x0032003E,
.p0_mpdgctrl0 = 0x42350231,
.p0_mpdgctrl1 = 0x021A0218,
.p0_mprddlctl = 0x4B4B4E49,
.p0_mpwrdlctl = 0x3F3F3035,
};
/*
* 2 Gbit DDR3 memory
* - NANYA #NT5CC128M16IP-DII
* - NANYA #NT5CB128M16FP-DII
*/
static const struct mx6_ddr3_cfg dhcom_mem_ddr_2g = {
.mem_speed = 1600,
.density = 2,
.width = 16,
.banks = 8,
.rowaddr = 14,
.coladdr = 10,
.pagesz = 2,
.trcd = 1375,
.trcmin = 5863,
.trasmin = 3750,
};
/*
* 4 Gbit DDR3 memory
* - Intelligent Memory #IM4G16D3EABG-125I
*/
static const struct mx6_ddr3_cfg dhcom_mem_ddr_4g = {
.mem_speed = 1600,
.density = 4,
.width = 16,
.banks = 8,
.rowaddr = 15,
.coladdr = 10,
.pagesz = 2,
.trcd = 1375,
.trcmin = 4875,
.trasmin = 3500,
};
/* DDR3 64bit */
static const struct mx6_ddr_sysinfo dhcom_ddr_64bit = {
/* width of data bus:0=16,1=32,2=64 */
.dsize = 2,
.cs_density = 32,
.ncs = 1, /* single chip select */
.cs1_mirror = 1,
.rtt_wr = 1, /* DDR3_RTT_60_OHM, RTT_Wr = RZQ/4 */
.rtt_nom = 1, /* DDR3_RTT_60_OHM, RTT_Nom = RZQ/4 */
.walat = 1, /* Write additional latency */
.ralat = 5, /* Read additional latency */
.mif3_mode = 3, /* Command prediction working mode */
.bi_on = 1, /* Bank interleaving enabled */
.sde_to_rst = 0x10, /* 14 cycles, 200us (JEDEC default) */
.rst_to_cke = 0x23, /* 33 cycles, 500us (JEDEC default) */
.refsel = 1, /* Refresh cycles at 32KHz */
.refr = 3, /* 4 refresh commands per refresh cycle */
};
/* DDR3 32bit */
static const struct mx6_ddr_sysinfo dhcom_ddr_32bit = {
/* width of data bus:0=16,1=32,2=64 */
.dsize = 1,
.cs_density = 32,
.ncs = 1, /* single chip select */
.cs1_mirror = 1,
.rtt_wr = 1, /* DDR3_RTT_60_OHM, RTT_Wr = RZQ/4 */
.rtt_nom = 1, /* DDR3_RTT_60_OHM, RTT_Nom = RZQ/4 */
.walat = 1, /* Write additional latency */
.ralat = 5, /* Read additional latency */
.mif3_mode = 3, /* Command prediction working mode */
.bi_on = 1, /* Bank interleaving enabled */
.sde_to_rst = 0x10, /* 14 cycles, 200us (JEDEC default) */
.rst_to_cke = 0x23, /* 33 cycles, 500us (JEDEC default) */
.refsel = 1, /* Refresh cycles at 32KHz */
.refr = 3, /* 4 refresh commands per refresh cycle */
};
static void ccgr_init(void)
{
struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
writel(0x00C03F3F, &ccm->CCGR0);
writel(0x0030FC03, &ccm->CCGR1);
writel(0x0FFFC000, &ccm->CCGR2);
writel(0x3FF00000, &ccm->CCGR3);
writel(0x00FFF300, &ccm->CCGR4);
writel(0x0F0000C3, &ccm->CCGR5);
writel(0x000003FF, &ccm->CCGR6);
}
/* Board ID */
static iomux_v3_cfg_t const hwcode_pads[] = {
IOMUX_PADS(PAD_EIM_A19__GPIO2_IO19 | MUX_PAD_CTRL(GPIO_PAD_CTRL)),
IOMUX_PADS(PAD_EIM_A23__GPIO6_IO06 | MUX_PAD_CTRL(GPIO_PAD_CTRL)),
IOMUX_PADS(PAD_EIM_A22__GPIO2_IO16 | MUX_PAD_CTRL(GPIO_PAD_CTRL)),
};
static void setup_iomux_boardid(void)
{
/* HW code pins: Setup alternate function and configure pads */
SETUP_IOMUX_PADS(hwcode_pads);
}
/* DDR Code */
static iomux_v3_cfg_t const ddrcode_pads[] = {
IOMUX_PADS(PAD_EIM_A16__GPIO2_IO22 | MUX_PAD_CTRL(GPIO_PAD_CTRL)),
IOMUX_PADS(PAD_EIM_A17__GPIO2_IO21 | MUX_PAD_CTRL(GPIO_PAD_CTRL)),
};
static void setup_iomux_ddrcode(void)
{
/* ddr code pins */
SETUP_IOMUX_PADS(ddrcode_pads);
}
enum dhcom_ddr3_code {
DH_DDR3_SIZE_256MIB = 0x00,
DH_DDR3_SIZE_512MIB = 0x01,
DH_DDR3_SIZE_1GIB = 0x02,
DH_DDR3_SIZE_2GIB = 0x03
};
#define DDR3_CODE_BIT_0 IMX_GPIO_NR(2, 22)
#define DDR3_CODE_BIT_1 IMX_GPIO_NR(2, 21)
enum dhcom_ddr3_code dhcom_get_ddr3_code(void)
{
enum dhcom_ddr3_code ddr3_code;
gpio_request(DDR3_CODE_BIT_0, "DDR3_CODE_BIT_0");
gpio_request(DDR3_CODE_BIT_1, "DDR3_CODE_BIT_1");
gpio_direction_input(DDR3_CODE_BIT_0);
gpio_direction_input(DDR3_CODE_BIT_1);
/* 256MB = 0b00; 512MB = 0b01; 1GB = 0b10; 2GB = 0b11 */
ddr3_code = (!!gpio_get_value(DDR3_CODE_BIT_1) << 1)
| (!!gpio_get_value(DDR3_CODE_BIT_0));
return ddr3_code;
}
/* GPIO */
static iomux_v3_cfg_t const gpio_pads[] = {
IOMUX_PADS(PAD_GPIO_2__GPIO1_IO02 | MUX_PAD_CTRL(GPIO_PAD_CTRL)),
IOMUX_PADS(PAD_GPIO_4__GPIO1_IO04 | MUX_PAD_CTRL(GPIO_PAD_CTRL)),
IOMUX_PADS(PAD_GPIO_5__GPIO1_IO05 | MUX_PAD_CTRL(GPIO_PAD_CTRL)),
IOMUX_PADS(PAD_CSI0_DAT17__GPIO6_IO03 | MUX_PAD_CTRL(GPIO_PAD_CTRL)),
IOMUX_PADS(PAD_GPIO_19__GPIO4_IO05 | MUX_PAD_CTRL(GPIO_PAD_CTRL)),
IOMUX_PADS(PAD_DI0_PIN4__GPIO4_IO20 | MUX_PAD_CTRL(GPIO_PAD_CTRL)),
IOMUX_PADS(PAD_EIM_D27__GPIO3_IO27 | MUX_PAD_CTRL(GPIO_PAD_CTRL)),
IOMUX_PADS(PAD_KEY_ROW0__GPIO4_IO07 | MUX_PAD_CTRL(GPIO_PAD_CTRL)),
IOMUX_PADS(PAD_KEY_COL1__GPIO4_IO08 | MUX_PAD_CTRL(GPIO_PAD_CTRL)),
IOMUX_PADS(PAD_NANDF_CS1__GPIO6_IO14 | MUX_PAD_CTRL(GPIO_PAD_CTRL)),
IOMUX_PADS(PAD_NANDF_CS2__GPIO6_IO15 | MUX_PAD_CTRL(GPIO_PAD_CTRL)),
IOMUX_PADS(PAD_KEY_ROW1__GPIO4_IO09 | MUX_PAD_CTRL(GPIO_PAD_CTRL)),
IOMUX_PADS(PAD_SD3_DAT5__GPIO7_IO00 | MUX_PAD_CTRL(GPIO_PAD_CTRL)),
IOMUX_PADS(PAD_SD3_DAT4__GPIO7_IO01 | MUX_PAD_CTRL(GPIO_PAD_CTRL)),
IOMUX_PADS(PAD_CSI0_VSYNC__GPIO5_IO21 | MUX_PAD_CTRL(GPIO_PAD_CTRL)),
IOMUX_PADS(PAD_GPIO_18__GPIO7_IO13 | MUX_PAD_CTRL(GPIO_PAD_CTRL)),
IOMUX_PADS(PAD_SD1_CMD__GPIO1_IO18 | MUX_PAD_CTRL(GPIO_PAD_CTRL)),
IOMUX_PADS(PAD_SD1_DAT0__GPIO1_IO16 | MUX_PAD_CTRL(GPIO_PAD_CTRL)),
IOMUX_PADS(PAD_SD1_DAT1__GPIO1_IO17 | MUX_PAD_CTRL(GPIO_PAD_CTRL)),
IOMUX_PADS(PAD_SD1_DAT2__GPIO1_IO19 | MUX_PAD_CTRL(GPIO_PAD_CTRL)),
IOMUX_PADS(PAD_SD1_CLK__GPIO1_IO20 | MUX_PAD_CTRL(GPIO_PAD_CTRL)),
IOMUX_PADS(PAD_CSI0_PIXCLK__GPIO5_IO18 | MUX_PAD_CTRL(GPIO_PAD_CTRL)),
IOMUX_PADS(PAD_CSI0_MCLK__GPIO5_IO19 | MUX_PAD_CTRL(GPIO_PAD_CTRL)),
};
static void setup_iomux_gpio(void)
{
SETUP_IOMUX_PADS(gpio_pads);
}
/* Ethernet */
static iomux_v3_cfg_t const enet_pads[] = {
IOMUX_PADS(PAD_ENET_MDIO__ENET_MDIO | MUX_PAD_CTRL(ENET_PAD_CTRL)),
IOMUX_PADS(PAD_ENET_MDC__ENET_MDC | MUX_PAD_CTRL(ENET_PAD_CTRL)),
IOMUX_PADS(PAD_ENET_TX_EN__ENET_TX_EN | MUX_PAD_CTRL(ENET_PAD_CTRL)),
IOMUX_PADS(PAD_ENET_TXD0__ENET_TX_DATA0 | MUX_PAD_CTRL(ENET_PAD_CTRL)),
IOMUX_PADS(PAD_ENET_TXD1__ENET_TX_DATA1 | MUX_PAD_CTRL(ENET_PAD_CTRL)),
IOMUX_PADS(PAD_GPIO_16__ENET_REF_CLK | MUX_PAD_CTRL(ENET_PAD_CTRL)),
IOMUX_PADS(PAD_ENET_RX_ER__ENET_RX_ER | MUX_PAD_CTRL(ENET_PAD_CTRL)),
IOMUX_PADS(PAD_ENET_RXD0__ENET_RX_DATA0 | MUX_PAD_CTRL(ENET_PAD_CTRL)),
IOMUX_PADS(PAD_ENET_RXD1__ENET_RX_DATA1 | MUX_PAD_CTRL(ENET_PAD_CTRL)),
IOMUX_PADS(PAD_ENET_CRS_DV__ENET_RX_EN | MUX_PAD_CTRL(ENET_PAD_CTRL)),
/* SMSC PHY Reset */
IOMUX_PADS(PAD_EIM_WAIT__GPIO5_IO00 | MUX_PAD_CTRL(NO_PAD_CTRL)),
/* ENET_VIO_GPIO */
IOMUX_PADS(PAD_GPIO_7__GPIO1_IO07 | MUX_PAD_CTRL(NO_PAD_CTRL)),
/* ENET_Interrupt - (not used) */
IOMUX_PADS(PAD_RGMII_RD0__GPIO6_IO25 | MUX_PAD_CTRL(NO_PAD_CTRL)),
};
static void setup_iomux_enet(void)
{
SETUP_IOMUX_PADS(enet_pads);
}
/* SD interface */
static iomux_v3_cfg_t const usdhc2_pads[] = {
IOMUX_PADS(PAD_SD2_DAT0__SD2_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
IOMUX_PADS(PAD_SD2_DAT1__SD2_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
IOMUX_PADS(PAD_SD2_DAT2__SD2_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
IOMUX_PADS(PAD_SD2_DAT3__SD2_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
IOMUX_PADS(PAD_SD2_CLK__SD2_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
IOMUX_PADS(PAD_SD2_CMD__SD2_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
IOMUX_PADS(PAD_NANDF_CS3__GPIO6_IO16 | MUX_PAD_CTRL(NO_PAD_CTRL)), /* CD */
};
/* onboard microSD */
static iomux_v3_cfg_t const usdhc3_pads[] = {
IOMUX_PADS(PAD_SD3_DAT0__SD3_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
IOMUX_PADS(PAD_SD3_DAT1__SD3_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
IOMUX_PADS(PAD_SD3_DAT2__SD3_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
IOMUX_PADS(PAD_SD3_DAT3__SD3_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
IOMUX_PADS(PAD_SD3_CLK__SD3_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
IOMUX_PADS(PAD_SD3_CMD__SD3_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
IOMUX_PADS(PAD_SD3_RST__GPIO7_IO08 | MUX_PAD_CTRL(NO_PAD_CTRL)), /* CD */
};
/* eMMC */
static iomux_v3_cfg_t const usdhc4_pads[] = {
IOMUX_PADS(PAD_SD4_DAT0__SD4_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
IOMUX_PADS(PAD_SD4_DAT1__SD4_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
IOMUX_PADS(PAD_SD4_DAT2__SD4_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
IOMUX_PADS(PAD_SD4_DAT3__SD4_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
IOMUX_PADS(PAD_SD4_DAT4__SD4_DATA4 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
IOMUX_PADS(PAD_SD4_DAT5__SD4_DATA5 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
IOMUX_PADS(PAD_SD4_DAT6__SD4_DATA6 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
IOMUX_PADS(PAD_SD4_DAT7__SD4_DATA7 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
IOMUX_PADS(PAD_SD4_CLK__SD4_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
IOMUX_PADS(PAD_SD4_CMD__SD4_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
};
/* SD */
static void setup_iomux_sd(void)
{
SETUP_IOMUX_PADS(usdhc2_pads);
SETUP_IOMUX_PADS(usdhc3_pads);
SETUP_IOMUX_PADS(usdhc4_pads);
}
/* SPI */
static iomux_v3_cfg_t const ecspi1_pads[] = {
/* SS0 - SS of boot flash */
IOMUX_PADS(PAD_EIM_EB2__GPIO2_IO30 |
MUX_PAD_CTRL(SPI_PAD_CTRL | PAD_CTL_PUS_100K_UP)),
/* SS2 - SS of DHCOM SPI1 */
IOMUX_PADS(PAD_KEY_ROW2__GPIO4_IO11 |
MUX_PAD_CTRL(SPI_PAD_CTRL | PAD_CTL_PUS_100K_UP)),
IOMUX_PADS(PAD_EIM_D17__ECSPI1_MISO | MUX_PAD_CTRL(SPI_PAD_CTRL)),
IOMUX_PADS(PAD_EIM_D18__ECSPI1_MOSI | MUX_PAD_CTRL(SPI_PAD_CTRL)),
IOMUX_PADS(PAD_EIM_D16__ECSPI1_SCLK | MUX_PAD_CTRL(SPI_PAD_CTRL)),
};
static void setup_iomux_spi(void)
{
SETUP_IOMUX_PADS(ecspi1_pads);
}
int board_spi_cs_gpio(unsigned bus, unsigned cs)
{
if (bus == 0 && cs == 0)
return IMX_GPIO_NR(2, 30);
else
return -1;
}
/* UART */
static iomux_v3_cfg_t const uart1_pads[] = {
IOMUX_PADS(PAD_SD3_DAT7__UART1_TX_DATA | MUX_PAD_CTRL(UART_PAD_CTRL)),
IOMUX_PADS(PAD_SD3_DAT6__UART1_RX_DATA | MUX_PAD_CTRL(UART_PAD_CTRL)),
};
static void setup_iomux_uart(void)
{
SETUP_IOMUX_PADS(uart1_pads);
}
#ifdef CONFIG_FSL_USDHC
struct fsl_esdhc_cfg usdhc_cfg[1] = {
{USDHC4_BASE_ADDR},
};
int board_mmc_get_env_dev(int devno)
{
return devno - 1;
}
int board_mmc_getcd(struct mmc *mmc)
{
return 1; /* eMMC/uSDHC4 is always present */
}
int board_mmc_init(struct bd_info *bis)
{
SETUP_IOMUX_PADS(usdhc4_pads);
usdhc_cfg[0].esdhc_base = USDHC4_BASE_ADDR;
usdhc_cfg[0].sdhc_clk = mxc_get_clock(MXC_ESDHC4_CLK);
usdhc_cfg[0].max_bus_width = 8;
return fsl_esdhc_initialize(bis, &usdhc_cfg[0]);
}
#endif
/* USB */
static iomux_v3_cfg_t const usb_pads[] = {
IOMUX_PADS(PAD_GPIO_1__USB_OTG_ID | MUX_PAD_CTRL(NO_PAD_CTRL)),
IOMUX_PADS(PAD_EIM_D31__GPIO3_IO31 | MUX_PAD_CTRL(NO_PAD_CTRL)),
};
static void setup_iomux_usb(void)
{
SETUP_IOMUX_PADS(usb_pads);
}
/* Perform DDR DRAM calibration */
static int spl_dram_perform_cal(struct mx6_ddr_sysinfo const *sysinfo)
{
int ret = 0;
#ifdef CONFIG_MX6_DDRCAL
udelay(100);
ret = mmdc_do_write_level_calibration(sysinfo);
if (ret) {
printf("DDR3: Write level calibration error [%d]\n", ret);
return ret;
}
ret = mmdc_do_dqs_calibration(sysinfo);
if (ret) {
printf("DDR3: DQS calibration error [%d]\n", ret);
return ret;
}
#endif /* CONFIG_MX6_DDRCAL */
return ret;
}
/* DRAM */
static void dhcom_spl_dram_init(void)
{
enum dhcom_ddr3_code ddr3_code = dhcom_get_ddr3_code();
if (is_mx6dq()) {
mx6dq_dram_iocfg(64, &dhcom6dq_ddr_ioregs,
&dhcom6dq_grp_ioregs);
switch (ddr3_code) {
default:
printf("imx6qd: unsupported ddr3 code %d\n", ddr3_code);
printf(" choosing 1024 MB\n");
/* fall through */
case DH_DDR3_SIZE_1GIB:
mx6_dram_cfg(&dhcom_ddr_64bit,
&dhcom_mmdc_calib_4x2g_1066,
&dhcom_mem_ddr_2g);
break;
case DH_DDR3_SIZE_2GIB:
mx6_dram_cfg(&dhcom_ddr_64bit,
&dhcom_mmdc_calib_4x4g_1066,
&dhcom_mem_ddr_4g);
break;
}
/* Perform DDR DRAM calibration */
spl_dram_perform_cal(&dhcom_ddr_64bit);
} else if (is_cpu_type(MXC_CPU_MX6DL)) {
mx6sdl_dram_iocfg(64, &dhcom6sdl_ddr_ioregs,
&dhcom6sdl_grp_ioregs);
switch (ddr3_code) {
default:
printf("imx6dl: unsupported ddr3 code %d\n", ddr3_code);
printf(" choosing 1024 MB\n");
/* fall through */
case DH_DDR3_SIZE_1GIB:
mx6_dram_cfg(&dhcom_ddr_64bit,
&dhcom_mmdc_calib_4x2g_800,
&dhcom_mem_ddr_2g);
break;
}
/* Perform DDR DRAM calibration */
spl_dram_perform_cal(&dhcom_ddr_64bit);
} else if (is_cpu_type(MXC_CPU_MX6SOLO)) {
mx6sdl_dram_iocfg(32, &dhcom6sdl_ddr_ioregs,
&dhcom6sdl_grp_ioregs);
switch (ddr3_code) {
default:
printf("imx6s: unsupported ddr3 code %d\n", ddr3_code);
printf(" choosing 512 MB\n");
/* fall through */
case DH_DDR3_SIZE_512MIB:
mx6_dram_cfg(&dhcom_ddr_32bit,
&dhcom_mmdc_calib_2x2g_800,
&dhcom_mem_ddr_2g);
break;
case DH_DDR3_SIZE_1GIB:
mx6_dram_cfg(&dhcom_ddr_32bit,
&dhcom_mmdc_calib_2x4g_800,
&dhcom_mem_ddr_4g);
break;
}
/* Perform DDR DRAM calibration */
spl_dram_perform_cal(&dhcom_ddr_32bit);
}
}
void dram_bank_mmu_setup(int bank)
{
int i;
set_section_dcache(ROMCP_ARB_BASE_ADDR >> MMU_SECTION_SHIFT, DCACHE_DEFAULT_OPTION);
set_section_dcache(IRAM_BASE_ADDR >> MMU_SECTION_SHIFT, DCACHE_DEFAULT_OPTION);
for (i = MMDC0_ARB_BASE_ADDR >> MMU_SECTION_SHIFT;
i < ((MMDC0_ARB_BASE_ADDR >> MMU_SECTION_SHIFT) +
(SZ_1G >> MMU_SECTION_SHIFT));
i++)
set_section_dcache(i, DCACHE_DEFAULT_OPTION);
}
void board_init_f(ulong dummy)
{
/* setup AIPS and disable watchdog */
arch_cpu_init();
ccgr_init();
gpr_init();
/* setup GP timer */
timer_init();
setup_iomux_boardid();
setup_iomux_ddrcode();
setup_iomux_gpio();
setup_iomux_enet();
setup_iomux_sd();
setup_iomux_spi();
setup_iomux_uart();
setup_iomux_usb();
/* UART clocks enabled and gd valid - init serial console */
preloader_console_init();
/* DDR3 initialization */
dhcom_spl_dram_init();
/* Set up early MMU tables at the beginning of DRAM and start d-cache */
gd->arch.tlb_addr = MMDC0_ARB_BASE_ADDR + SZ_32M;
gd->arch.tlb_size = PGTABLE_SIZE;
enable_caches();
/* Clear the BSS. */
memset(__bss_start, 0, __bss_end - __bss_start);
/* load/boot image from boot device */
board_init_r(NULL, 0);
}
void spl_board_prepare_for_boot(void)
{
/*
* Flush and disable dcache. Without it, the following bootstage might fail randomly because
* dirty cache lines may not have been written back to DRAM.
*
* If dcache_disable() would be omitted, the following scenario may occur:
*
* The SPL enables dcache and cachelines get populated with data. Then dcache gets disabled
* in U-Boot proper, but still contains dirty data, i.e. the corresponding DRAM locations
* have not yet been updated. When U-Boot reads these locations, it sees an (incorrect) old
* state of the content.
*
* Furthermore, the DRAM contents have likely been modified by U-Boot while dcache was
* disabled. Thus, U-Boot flushing dcache would corrupt DRAM with stale data.
*/
dcache_disable(); /* implies flush_dcache_all() */
}
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